body{
    font-family: "arial",sans-serif;
    background-color: #ffe;
}
.form{
    width: 400px;
    margin: 150px auto;
    border: 1px solid #ccc;
}
.form h1{
          text-align: center;
          color: #0101df;
          margin: 0px;
          padding: 5px;
          border: 1px solid #ccc;
}
.form p{
     text-align: center;
     color: blue;
     margin: 0px;
     border: 1px solid #ccc;
}
/*按钮样式*/
#btn input{
      width: 60px;
      height: 30px;
      font-weight: bold;
}